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Finding the Fourth Proportional to 103,543.58, 155,087.70 and 85,570.54

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Solution

The fourth proportional to 103,543.58, 155,087.70 and 85,570.54 is: 128,167.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,543.58 : 155,087.70 = 85,570.54 : x
  2. Step 2: Convert to fraction form
    103,543.58/155,087.70 = 85,570.54/x
  3. Step 3: Cross multiply
    103,543.58x = 155,087.70 × 85,570.54
  4. Step 4: Simplify right side
    103,543.58x = 13,270,938,062.57
  5. Step 5: Solve for x
    x = 13,270,938,062.57/103,543.58
  6. Step 6: Final answer
    x = 128,167.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.